Carbureter.



E. N. BHODERICK.

v CARBURETER. APPLICATION FILED OCT- 29,1912- RENEWED HAR. I, 1916.

Patented Deo. 11916.

2 SHEETS-SHEET l.

tit l ERNEST hl'. BRIDERXCK, F IDETBUIT, MICHIGAN.

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nearest Y Specification of ietters Patent.

patented nee. a. raie..

.application filed October 29, 1912, Serial No. '72@,4611 Renewed March 1,A 1916. Serial No. 81,550.

To all whom t may concern:

Be-it known lthat li, ERNna'r N. BRODER- ICK, a citizen of the United States of Amer-l ica, residing at Detroit*y inthe county. of Wayne and State of Michigan, have invent ed certainnew and useful improvements in .Carbureters of which the following is a 4inafter set forth and more particularly specification, reference being had therein to the accompanying drawings. I

This invention relates to float feedl carbureters of the multiple type wherein a single fuel inlet is'controlled by a single float regardless of the number of outlets and miX- ing chambers. j y

The invention consists in the matters herepointed out in the appended claims.

ln the drawings, Figure; is a view partiallyAv in elevation and partially in section of a carbureter embodying features of the invention; lFig. 2 is a view in section on line 11-11 of Fig. 1.

As herein indicated a pair of `miXing chambers 1 with any preferred form of controlling device and .auxiliary outlets,l are seated on. a base or float lchamber 2 provided with a pair f tapered 'bored 'air tubes '3 extending therethrough, the bore of each tube preferably having spiral deflectors 4: lon the wall to impart rotary motion to the incoming current of air. A cross bar 5 on each tube has a fuel duct 65 in communica-v closure 8 controlled from one of the mixingl titl) tion with the bore of an upright fuel nipple 7 whose upper ends is counterbored or other'- wise adaptedto form a seat for a needle chambers.

lateral extension 9 of the float cham-i ber7 whose lower Wall is preferably at an interval above the base lof the chamber is apertured to receive a bushing 10 having an annular valve seat 11 on its upper end and a counterbored guide passage l2 at its lower end of thebushing 10 serves tocenter a needle closure 18 over the vvalve'seat 1,1,` the Stem of the latter passing upwardly through a bushing 19 and a cap 20 retained thereon by a collar 21. rlfonlimit the movement of gthe chambers, a plura vextending through the base each openthe stem and to prevent disturbance of the I'latter from the exterior, a safety yblock 22 is placed thereon to check its upward move'- ment.

Aloat 23 of suitable material and conformation lies in the base or float chamber 2 preferably being of the |ll shape herein indicated 4to clear the air tubes and to give sufficient buoyancy. A gimbal plate 24 has a pair of upwardly extending arms 25 with hanging arm pivot pins 26 inserted in the cross portion of theplate. Arms 27 at the gimbal plate ends are likewise pivoted to the yoke on bearing pins 29 at right angles to thepins 2G. 'lhe gimbal yoke has its arms 30 pivoted on the pins 29 and its stem is fulcrumed on a cross pin 3l transversely -stiffening web 36 connecting-'the arms 32.

By this form of carbureter a single float control feed is obtained suitable for use withtWo or more mixing chambers. The construction of the alr tubes imparts rotary motion for air indrawn therethrough, thereby obtaining uniform mixture at the outlet mouths of the fuel tubes because of the are rangement of the 'fuel closure and valve-4 .seat together with the guiding members, the

-parts are easily machined and the device may be adjusted as is necessary under conditions'of service.`

'Obviously changes inthe details of construction may be made Withoutqdeparting from the spiritof the invention and l do not care to limit myself to anyparticular form or arrangement of parts. v

What ll claim is y l. A multiple float feed carbureter comprising mixing chambers a base supporting lay for aa tubes ing mto a mixing chamber, spiral deflectors on the interior of each tube, a fuel vnipple in eachtube having a bore in communication withthe interior ofthe base, a' fuel inlet valve for the bore, a lfoat conforming tothe base, a fuel inlet valve for the base having a needlel closure7 a'gimbal yoke pivoted on the base operatively connected to the closure,

a gimbal plate pivoted to the yoke parallel to the axis of oscillation of the latter and swiveled to the ioat transversely t0 the axis .of oscillation to 'the yoke, and manually operable means for regulating the float through the nipples.-

2. A. multiple float feed Vcarbureter comprising a base, mixing chambers supported on the base, air tubes extending through the base each opening into a' chamber, afloat in the base substantially surrounding the airY tubes, a lateral extension on the base, a bushing in thevbase of the extension having an annular valve seat above the level of the bottom of the base, a guide bushing in the upper part of the extension, a closurel for the seat having a stem reciprocatable through the guide bushing, a safety block on the stem for checking the upward movement of thel closure, and gimbal connections between the float andclosure for operating 4the latter.

` 3. A multiple oat feed carbureter comprising a base, mixing chambers supportedV on the base,Y air tubes extending-through the base each .opening into a chamber, a floatin the base substantially surrounding theair tubes, a. lateral yextension on the base, a bushingfin the base of the extension having an annular valve seat above the level of the bottom of the base, a guide bushing in the upper part of the extension, a closure for the seat having a stem reciproca-ble through the guide bushing, a safety block on the stem for checkingthe 4upward movement of the )rising a basemixing chambers su) Jorted on the base, air tubes extending through the base each opening into a chamber, a float in the base substantially surrounding the air tubes, a lateral extension on the base, a bushing .in the base of the extension having an annular valve seat above the level of the bottom of the base, a guide bushing in the upper part of the extension, a closure for the seat having a stem reciprocable through the guide bushing, a safety block on the stem for checking the upward movement of the closure, gimbal connections between the float and closure for operating the latter, a transversely disposed pivot pin in the extension, a gimbal 'yoke fulcrumed on the pin and 4operatively connected at its outer end to the closure, a gimbal plate having arms pivotcd to the extremities of the yoke and Jfransversely disposed arms pivoted tothe float, and spiral deiiectors on the Walls of the air tubes.

In testimony' whereof I aiiix my signature.

in presence of tvvowitnesses.

ERNEST N. BRODERICK.

Witnesses: i

` OTTO F. BARTHEL, C? R. STICKNEY.A 

